:root {
  color-scheme: light;
  --ink: #101828;
  --muted: #5f6b7c;
  --line: #e5eaf1;
  --paper: #ffffff;
  --soft: #f5f8fc;
  --blue: #1677e8;
  --blue-dark: #0b58bb;
  --cyan: #55c9f5;
  --shadow: 0 24px 80px rgba(20, 47, 82, .12);
}

* { box-sizing: border-box; }
html { scroll-behavior: smooth; }
body {
  margin: 0;
  color: var(--ink);
  background: var(--paper);
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", sans-serif;
  line-height: 1.65;
  -webkit-font-smoothing: antialiased;
}
a { color: inherit; }
.wrap { width: min(1120px, calc(100% - 40px)); margin: 0 auto; }
.site-header {
  position: sticky;
  top: 0;
  z-index: 10;
  border-bottom: 1px solid rgba(229, 234, 241, .8);
  background: rgba(255, 255, 255, .88);
  backdrop-filter: blur(18px);
}
.nav { min-height: 72px; display: flex; align-items: center; justify-content: space-between; gap: 24px; }
.brand { display: inline-flex; align-items: center; gap: 11px; font-size: 21px; font-weight: 760; text-decoration: none; letter-spacing: -.02em; }
.brand img { width: 38px; height: 38px; }
.nav-links { display: flex; align-items: center; gap: 24px; color: #465166; font-size: 14px; }
.nav-links a { text-decoration: none; }
.nav-links a:hover { color: var(--blue); }
.hero {
  overflow: hidden;
  padding: 92px 0 76px;
  background:
    radial-gradient(circle at 15% 14%, rgba(85, 201, 245, .18), transparent 30%),
    radial-gradient(circle at 86% 30%, rgba(64, 104, 255, .15), transparent 32%),
    linear-gradient(180deg, #f9fcff 0%, #fff 80%);
}
.hero-grid { display: grid; grid-template-columns: 1.05fr .95fr; align-items: center; gap: 60px; }
.eyebrow { display: inline-flex; align-items: center; gap: 8px; color: var(--blue-dark); font-size: 14px; font-weight: 700; }
.eyebrow::before { content: ""; width: 8px; height: 8px; border-radius: 50%; background: var(--cyan); box-shadow: 0 0 0 6px rgba(85, 201, 245, .15); }
h1 { margin: 20px 0 22px; max-width: 760px; font-size: clamp(45px, 7vw, 76px); line-height: 1.06; letter-spacing: -.055em; }
.lead { max-width: 680px; margin: 0; color: var(--muted); font-size: clamp(18px, 2.3vw, 23px); }
.actions { display: flex; flex-wrap: wrap; gap: 12px; margin-top: 34px; }
.button { display: inline-flex; align-items: center; justify-content: center; min-height: 48px; padding: 0 22px; border-radius: 13px; border: 1px solid var(--line); font-weight: 700; text-decoration: none; }
.button.primary { color: #fff; border-color: var(--blue); background: linear-gradient(135deg, var(--blue), #3159e8); box-shadow: 0 10px 30px rgba(31, 111, 226, .25); }
.button.secondary { background: rgba(255,255,255,.75); }
.button[aria-disabled="true"] { cursor: default; }
.fine { margin-top: 14px; color: #7b8494; font-size: 13px; }
.app-card { position: relative; min-height: 440px; border: 1px solid rgba(218, 228, 240, .9); border-radius: 34px; background: rgba(255,255,255,.72); box-shadow: var(--shadow); backdrop-filter: blur(14px); }
.app-card::before { content: ""; position: absolute; inset: 22px; border-radius: 23px; background: linear-gradient(145deg, #f7fbff, #edf4ff); }
.orb { position: absolute; left: 50%; top: 50%; width: 190px; height: 190px; transform: translate(-50%, -58%); border-radius: 44px; background: linear-gradient(145deg, #67d8ff, #1677e8 58%, #304fe5); box-shadow: 0 24px 55px rgba(29, 112, 224, .3); }
.wave { position: absolute; left: 50%; top: 46%; display: flex; align-items: center; gap: 9px; transform: translate(-50%, -50%); }
.wave i { display: block; width: 8px; border-radius: 5px; background: white; box-shadow: 0 0 18px rgba(255,255,255,.35); }
.wave i:nth-child(1), .wave i:nth-child(7) { height: 30px; }
.wave i:nth-child(2), .wave i:nth-child(6) { height: 54px; }
.wave i:nth-child(3), .wave i:nth-child(5) { height: 76px; }
.wave i:nth-child(4) { height: 102px; }
.floating-note { position: absolute; right: 14px; bottom: 30px; max-width: 250px; padding: 14px 18px; border: 1px solid var(--line); border-radius: 16px; background: #fff; color: #344054; font-size: 14px; box-shadow: 0 14px 35px rgba(32, 55, 91, .12); }
.floating-note strong { display: block; color: var(--ink); font-size: 13px; }
.trust-strip { padding: 20px 0; border-block: 1px solid var(--line); color: #5c6677; background: #fbfcfe; }
.trust-list { display: flex; justify-content: center; flex-wrap: wrap; gap: 18px 46px; font-size: 14px; }
.trust-list span::before { content: "✓"; margin-right: 8px; color: var(--blue); font-weight: 800; }
.section { padding: 90px 0; }
.section.soft { background: var(--soft); }
.section-head { max-width: 760px; margin-bottom: 40px; }
.kicker { margin: 0 0 10px; color: var(--blue); font-size: 13px; font-weight: 800; letter-spacing: .12em; text-transform: uppercase; }
h2 { margin: 0 0 14px; font-size: clamp(31px, 4vw, 46px); line-height: 1.16; letter-spacing: -.035em; }
.section-head p, .copy { color: var(--muted); font-size: 17px; }
.cards { display: grid; grid-template-columns: repeat(3, 1fr); gap: 18px; }
.card { padding: 28px; border: 1px solid var(--line); border-radius: 22px; background: #fff; box-shadow: 0 8px 28px rgba(27, 50, 80, .05); }
.card .num { color: var(--blue); font-size: 13px; font-weight: 800; letter-spacing: .1em; }
.card h3 { margin: 14px 0 8px; font-size: 21px; }
.card p { margin: 0; color: var(--muted); }
.split { display: grid; grid-template-columns: .9fr 1.1fr; gap: 68px; align-items: start; }
.fact-list { margin: 0; padding: 0; list-style: none; border-top: 1px solid var(--line); }
.fact-list li { display: grid; grid-template-columns: 160px 1fr; gap: 20px; padding: 20px 0; border-bottom: 1px solid var(--line); }
.fact-list strong { font-size: 14px; }
.fact-list span { color: var(--muted); }
.notice { margin-top: 28px; padding: 20px 22px; border-left: 4px solid var(--blue); border-radius: 0 14px 14px 0; background: #eef6ff; color: #31425c; }
.cta { padding: 70px 0; color: #fff; background: linear-gradient(135deg, #0a5fbd, #203cba); }
.cta-row { display: flex; justify-content: space-between; align-items: center; gap: 40px; }
.cta h2 { margin-bottom: 8px; }
.cta p { margin: 0; color: rgba(255,255,255,.76); }
.cta .button { color: #173c85; border-color: white; background: white; }
.legal { padding: 70px 0 90px; }
.legal article { max-width: 820px; }
.legal h1 { margin-bottom: 12px; font-size: clamp(38px, 6vw, 58px); }
.legal .updated { color: #7b8494; }
.legal h2 { margin-top: 44px; font-size: 25px; letter-spacing: -.02em; }
.legal h3 { margin-top: 28px; }
.legal p, .legal li { color: #4e596b; }
.legal li + li { margin-top: 8px; }
.support-grid { display: grid; grid-template-columns: repeat(2, 1fr); gap: 18px; margin-top: 34px; }
.site-footer { padding: 36px 0; border-top: 1px solid var(--line); background: #fbfcfe; color: #697386; font-size: 14px; }
.footer-row { display: flex; justify-content: space-between; gap: 30px; }
.footer-links { display: flex; flex-wrap: wrap; gap: 20px; }
.footer-links a { text-decoration: none; }

@media (max-width: 820px) {
  .nav-links a:not(.lang) { display: none; }
  .hero { padding-top: 66px; }
  .hero-grid, .split { grid-template-columns: 1fr; }
  .app-card { min-height: 360px; }
  .cards { grid-template-columns: 1fr; }
  .cta-row, .footer-row { align-items: flex-start; flex-direction: column; }
}
@media (max-width: 520px) {
  .wrap { width: min(100% - 28px, 1120px); }
  .nav { min-height: 64px; }
  .hero { padding: 52px 0 58px; }
  h1 { font-size: 43px; }
  .app-card { min-height: 315px; border-radius: 26px; }
  .orb { width: 150px; height: 150px; border-radius: 35px; }
  .floating-note { right: 6px; bottom: 18px; }
  .section { padding: 68px 0; }
  .fact-list li { grid-template-columns: 1fr; gap: 5px; }
  .support-grid { grid-template-columns: 1fr; }
}